Cubs starting pitcher Jon Lester

Cubs pitcher Jon Lester takes the stage at the Bricks and Ivy Ball on May 9, 2019, at Navy Pier.

Cubs pitcher Jon Lester talks with a teammate in the dugout during the third inning against the Pirates at on April 10, 2019, at Wrigley Field.

Cubs starting pitcher Jon Lester is pulled from the game in the third inning on April 8, 2019, at Wrigley Field.

Cubs starting pitcher Jon Lester leaves the game after the fifth inning against the Dodgers on April 25, 2019, at Wrigley Field.

Cubs starting pitcher Jon Lester delivers to the plate against the Dodgers in the first inning on April 25, 2019, at Wrigley Field.

Cubs starting pitcher Jon Lester walks off the mound after pitching during the first inning of a cactus league game against the Padres at spring training in Sloan Park on Feb. 25, 2019.

Cubs starting pitcher Jon Lester pitches during the second inning of a cactus league game against the Padres at spring training in Sloan Park on Feb. 25, 2019.

Cubs starting pitcher Jon Lester during the first inning of a cactus league game against the Padres at spring training in Sloan Park on Feb. 25, 2019.

Cubs starting pitcher Jon Lester reacts after striking out the final batter in the fourth inning against the Pirates at Wrigley Field on Sept. 27, 2018.

Cubs right fielder Jason Heyward and starting pitcher Jon Lester leave the Cubs offices after they lost to the Rockies in the NL wild-card game the previous night at Wrigley Field on Oct. 3, 2018, in Chicago.

Cubs starting pitcher Jon Lester shakes hands while bartending at the Anthony Rizzo Family Foundation’s sixth annual Cook-Off for Cancer fundraiser at Morgan Manufacturing in Chicago on May 9, 2018.

Cubs starting pitcher Jon Lester in the dugout after being lifted for a pinch hitter in the sixth inning of the National League wild-card game on Oct. 2, 2018, at Wrigley Field.

Cubs starting pitcher Jon Lester reacts after getting out of the six inning of the National League wild-card game Oct. 2, 2018, at Wrigley Field.

Cubs starting pitcher Jon Lester acknowledges third baseman David Bote after he made a play to end the third inning of the National League wild-card game against the Rockies on Oct. 2, 2018, at Wrigley Field.

Cubs starting pitcher Jon Lester delivers a pitch against the Rockies at Wrigley Field on April 30, 2018.

Cubs starting pitcher Jon Lester heads to the clubhouse after he pitched his last inning against the Reds at Wrigley Field on Sept. 15, 2018.

Cubs starting pitcher Jon Lester smiles in the dugout after his performance against the Pirates at Wrigley Field on June 9, 2018.

Cubs starting pitcher Jon Lester reacts, after giving up a home run to Nationals first baseman Ryan Zimmerman at Wrigley Field on Aug. 11, 2018.

Cubs starting pitcher Jon Lester reacts after giving up a home run to Nationals second baseman Daniel Murphy during the fourth inning at Wrigley Field on Aug. 11, 2018.

Cubs starting pitcher Jon Lester celebrates after hitting an RBI single against the Mets at Wrigley Field on Aug. 27, 2018.

Cubs starting pitcher Jon Lester retreats to the dugout and mops his head after being pulled in the fourth inning against the Cardinals at Wrigley Field on July 20, 2018.

Cubs pitcher Jon Lester has a laugh while attending Cubs manager Joe Maddon’s annual charity boxing event at the Wintrust Building in Chicago on May 25, 2018.

Cubs pitcher Jon Lester warms up on the field before the Cubs play the Pirates on Sept. 26, 2018, at Wrigley Field.

Cubs pitcher Jon Lester sits in the dugout during a game against the Padres on Aug. 5, 2018, at Wrigley Field.

Cubs starting pitcher Jon Lester walks through the dugout before the first inning against the Indians at Wrigley Field on May 23, 2018.

Cubs starting pitcher Jon Lester bunts during the fifth inning against the Dodgers on June 20, 2018, at Wrigley Field.

Jon Lester delivers to the Cardinals in the third inning on Thursday, April 19, 2018 at Wrigley Field.

Jon Lester prepares for his start against the Cardinals on Thursday, April 19, 2018 at Wrigley Field.

Jon Lester bunts in an RBI during the ninth inning against the Milwaukee Brewers at Miller Park on April 7, 2018 in Milwaukee, Wisconsin.

Cubs pitcher Jon Lester warms up during the first day of pitchers and catchers practice at Sloan Park during Cubs spring training Wednesday Feb. 14, 2018, in Mesa, Ariz.

Cubs pitcher Jon Lester pitches during the first day of pitchers and catchers practice at Sloan Park during Cubs spring training Wednesday Feb. 14, 2018, in Mesa, Ariz.

Cubs pitcher Jon Lester pitches during the first day of pitchers and catchers practice at Sloan Park during Cubs spring training Wednesday Feb. 14, 2018, in Mesa, Ariz.

Cubs pitcher Jon Lester walks with other pitchers during the first day of pitchers and catchers practice at Sloan Park during Cubs spring training Wednesday Feb. 14, 2018, in Mesa, Ariz.

Jon Lester stretches with other players during the second day of Cubs spring training at Sloan Park Thursday Feb. 15, 2018, in Mesa, Ariz.

Jon Lester stretches with other players during the second day of Cubs spring training at Sloan Park Thursday Feb. 15, 2018, in Mesa, Ariz.

Cubs starting pitcher Jon Lester leaves the game during the second inning against the Reds on Aug. 17, 2017.

Jon Lester throws a pitch against the Diamondbacks during the first inning on Aug. 12, 2017.

Jon Lester leaves Wrigley Field dressed in an “Easy Rider”-themed outfit as the Cubs leave Wrigley Field for a raod trip on Aug. 6, 2017.

Jon Lester hits a home run in the third inning against the Diamondbacks at Wrigley Field on Aug. 1, 2017.

Jon Lester celebrates with teammates after hitting a home run in the third inning against the Diamondbacks at Wrigley Field on Aug. 1, 2017.

Cubs starting pitcher Jon Lester warms up in the outfield before throwing against the Diamondbacks at Wrigley Field on Aug. 1, 2017.

Willson Contreras talks with starting pitcher Jon Lester after he’s replaced by Mike Montgomery during the 7th inning against the Nationals on Aug. 6, 2017.

Cubs starting pitcher Jon Lester walks to the dugout after warming up before facing the Braves at SunTrust Park on July 17, 2017.

Cubs starting pitcher Jon Lester in the dugout before facing the Braves at SunTrust Park on July 17, 2017.

Cubs starting pitcher Jon Lester leaves the game after allowing 10 runs to the Pirates in the first inning Sunday, July 9, 2017, at Wrigley Field.

Cubs starting pitcher Jon Lester throws during the second inning against the Rays on Tuesday, July 4, 2017, at Wrigley Field.

Cubs pitcher Jon Lester throws in the first inning to the Marlins’ Christian Yelich at Marlins Park on June 24, 2017, in Miami.

Cubs starting pitcher Jon Lester is congratulated by his teammates after picking off Cardinals baserunner Tommy Pham to end the top of the fifth inning of a game at Wrigley Field in Chicago on Saturday, June 3, 2017.

Cubs starting pitcher Jon Lester walks through the dugout after the second inning of a game against the Cardinals at Wrigley Field on Saturday, June 3, 2017.

Cubs pitcher Jon Lester throws a pitch in the first inning against the Dodgers at Dodger Stadium on May 28, 2017, in Los Angeles.

Cubs starting pitcher Jon Lester departs for the team’s Anchorman-themed road trip Thursday, May 25, 2017, at Wrigley Field.

Cubs starting pitcher Jon Lester gets a hug from John Lackey after their 4-1 win over the Giants at Wrigley Field on Tuesday, May 23, 2017.

Cubs starting pitcher Jon Lester after he struck out during the third inning of their game against the Giants at Wrigley Field on Tuesday, May 23, 2017.

Cubs fans cheer for starting pitcher Jon Lester as he leaves the field during the seventh inning of a game against the Reds in Chicago on Thursday, May 18, 2017.

Cubs starting pitcher Jon Lester throws against the Reds in the first inning at Wrigley Field on Thursday, May 18, 2017, in Chicago.

Cubs starting pitcher Jon Lester stands by after giving up a solo homer to Phillies hitter Aaron Altherr in the first inning at Wrigley Field in Chicago on Tuesday, May 2, 2017.

Theo Epstein and Jon Lester at Fenway Park before a game against the Red Sox on April 28, 2017.

Cubs pitcher Jon Lester blows a bubble in the dugout before a game against the Pirates at PNC Park on April 24, 2017 in Pittsburgh, Pa.

Cubs starting pitcher Jon Lester celebrates with Cubs shortstop Addison Russell after they ended the fifth inning with a double play against the Pirates at Wrigley Field on Sunday, April 16, 2017.

Cubs infielders take positions close to the plate as Cubs starting pitcher Jon Lester forces Pirates starting pitcher Jameson Taillon to bunt into a double play during the fifth inning at Wrigley Field in Chicago on Sunday, April 16, 2017.

With the Commissioner’s Trophy in the foreground, Cubs starting pitcher Jon Lester hugs former Cubs catcher David Ross after Ross threw out the ceremonial first pitch before a game against the Dodgers at Wrigley Field in Chicago on Wednesday, April 12, 2017.

Cubs starting pitcher Jon Lester delivers to the Dodgers in the second inning Monday, April 10, 2017, at Wrigley Field.

Cubs pitcher Jon Lester throws during a spring training workout on Feb. 14, 2017, in Mesa, Ariz.

Cubs pitcher Jon Lester practices fielding drills during spring training at the Under Armour Performance Center on Feb. 16, 2017, in Mesa, Ariz.

Cubs pitcher Jon Lester warms up during spring training at the Under Armour Performance Center on Feb. 19, 2017, in Mesa, Ariz.

Cubs pitcher Jon Lester waits to throw during a spring training workout on Feb. 14, 2017, in Mesa, Ariz.

Cubs pitcher Jon Lester says hello to former Cubs players on the first day of the Cubs Convention at the Sheraton Grand Chicago on Friday, Jan. 13, 2017.

Jon Lester holds the Commissioner’s Trophy on Friday, Nov. 4, 2016, as the Chicago Cubs celebrate their World Series championship with a rally in Grant Park.

Jon Lester and teammatess celebrate in the locker room after winning the World Series over the Indians at Progressive Field in Cleveland in the early hours of Thursday, Nov. 3, 2016.

Jon Lester reacts to striking out Indians second baseman Jason Kipnis with two men on base in the seventh inning Wednesday, Nov. 2, 2016, during Game 7 of the World Series at Progressive Field in Cleveland.

Jon Lester pitches in relief of Kyle Hendricks in the fifth inning Wednesday, Nov. 2, 2016, during Game 7 of the World Series at Progressive Field in Cleveland.

Indians second baseman Jason Kipnis scores under the tag of Jon Lester in the fifth inning Wednesday, Nov. 2, 2016, in Game 7 of the World Series at Progressive Field in Cleveland.

Jon Lester on Wednesday, Nov. 2, 2016, before Game 7 of the World Series at Progressive Field in Cleveland.

Jon Lester points to catcher David Ross after Ross threw out the Indians’ Francisco Lindor, who attempted to steal second in the sixth inning of Game 5 of the World Series on Oct. 30, 2016 at Wrigley Field.

The Indians’ Jason Kipnis grounds out on a pitch from Jon Lester in the fourth inning of Game 5 of the World Series at Wrigley Field on Oct. 30, 2016.

Jon Lester reacts after pitching in the fifth inning against the Indians in Game 5 of the World Series at Wrigley Field on Oct. 30, 2016.

Jon Lester warms up before Game 5 of the World Series at Wrigley Field on Oct. 30, 2016.

Jon Lester gets ready to take batting practice before Game 4 of the World Series at Wrigley Field on Oct. 29, 2016.

Jon Lester walks off the field after being relieved during the sixth inning of Game 1 of the World Series at Progressive Field on Oct. 25, 2016.

Jon Lester wipes his face as he leaves the game during the sixth inning of Game 1 of the World Series at Progressive Field on Oct. 25, 2016.

Jon Lester delivers to the Indians’ Mike Napoli in the first inning of Game 1 of the World Series at Progressive Field on Oct. 25, 2016.

NLCS co-MVPs Jon Lester and Javier Baez pose at Wrigley Field on Oct. 22, 2016.

Jon Lester stands draped in a “W” flag after the Cubs clinched a spot in the World Series on Saturday, Oct. 22, 2016, in Game 6 of the National League Championship Series at Wrigley Field.

Jon Lester celebrates in the clubhouse after the Cubs won the NLCS at Wrigley Field on Oct. 22, 2016.

Jon Lester gets a hug from David Ross in the seventh inning Oct. 20, 2016, in Game 5 of the NLCS at Dodger Stadium in Los Angeles.

Jon Lester celebrates getting out of the third inning on Oct. 20, 2016, in Game 5 of the National League Championship Series at Dodger Stadium in Los Angeles.

Jon Lester gets applause as he heads back into the dugout after being pulled for a pinch-hitter in the sixth inning against the Dodgers on Saturday, Oct. 15, 2016, in Game 1 of the National League Championship Series at Wrigley Field.

Dexter Fowler is greeted by Jon Lester after Fowler made a diving catch on a Dodgers catcher Carlos Ruiz line drive in the fourth inning Saturday, Oct. 15, 2016, in Game 1 of the National League Championship Series at Wrigley Field.

Jon Lester delivers to the Dodgers in the first inning Saturday, Oct. 15, 2016, in Game 1 of the National League Championship Series at Wrigley Field.

Jon Lester works out Friday, Oct. 14, 2016, before the National League Championship Series at Wrigley Field.

Cubs starting pitcher Jon Lester throws in the first inning of Game 1 of a National League Division Series against the Giants at Wrigley Field on Oct. 7, 2016.

Jon Lester fields a ground ball in the sixth inning against the Giants at Wrigley Field on October 7, 2016.

Jon Lester works out Thursday, Oct. 6, 2016, before Game 1 of the National League Division Series at Wrigley Field.

Jon Lester speaks Thursday, Oct. 6, 2016, before Game 1 of the National League Division Series at Wrigley Field.

Jon Lester walks out of the dugout Thursday, Oct. 6, 2016, a day before starting Game 1 of the National League Division Series against the Giants at Wrigley Field.

Cubs starting pitcher Jon Lester throws in the first inning against the Reds on Oct. 1, 2016, in Cincinnati.

Cubs starting pitcher Jon Lester sits in the dugout after closing the third inning against the Reds on Oct. 1, 2016, in Cincinnati.

David Ross with Jon Lester after his home run against the Cardinals during the fifth inning at Wrigley Field on Sept. 25, 2016.

Jon Lester delivers a pitch against the Cardinals during the first inning at Wrigley Field on Sept. 25, 2016.